1. American Council on the Teaching of Foreign Languages. (2017). NCSSFL-ACTFL Can-Do Statements: Performance indicators for language learners. https://www.actfl.org/sites/default/files/can-dos/Novice%20Can-Do_Statements.pdf
2. American Council on the Teaching of Foreign Languages. (2021, May 22). Class size as a factor influencing language learning. https://www.actfl.org/list/position-statement/class-size-factor-influencing-language-learning
3. Baralt, M., & Morcillo Gómez, J. (2017). Task-based language teaching online: A guide for teachers. Language Learning & Technology, 21(3), 28–43. http://hdl.handle.net/10125/44630
4. Blake, R., Wilson, N. L., Cetto, M., & Pardo Ballester, C. (2008). Measuring oral proficiency in distance, face-to-face, and blended classrooms. Language Learning & Technology, 12(3), 114–127. http://dx.doi.org/10125/44158
5. Branch, R. M., & Dousay, T. A. (2015). Survey of instructional design models (5th ed.). Association for Educational Communications & Technology.